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► General
- General tips
- Marginal significance
- Tips/tricks for using SPSS
- What are "Descriptive Statistics"?
- What are "Inferential Statistics"?
► Data Screening
- What is the purpose of data screening/cleaning?
- Tips/tricks for Data cleaning
- Checking Data Entry
► Missing Values
- Why do missing values occur?
- Why is missing data a problem?
- How do I identify if missing values are random or non-random?
- How do I deal with missing data?
► Outliers
- What are outliers?
- Should I check for outliers?
- How can I tell if outliers are influencing my data?
- How do I detect univariate outliers in my data?
- How do I detect bivariate and multivariate outliers in my data?
- How do I deal with outliers?
► Normality
- What is "normality"?
- Why is normality important?
- How do I determine whether my data are normal?
- How do I deal with non-normality?
- How do I transform variables?
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► Statistical Tests
- Meta-analysis
- Mediation
- What is an Interaction?
- Interaction between two continuous variables
- Interaction between categorical and continuous variables
- What is a correlation?
- What is a partial correlation?
- What is a point-biserial correlation?
- What is regression?
► Other
- What is a scatterplot?
- What is linearity?
- Want help using SPSS?
- What is "syntax" in SPSS?
► Transforming continuous into categorical variables
- Why transform continuous variables into categorical variables?
- How to dichotomize variables?
- Why cut into thirds or fourths instead of dichotomizing?
► Composites
- How do I create a composite of items?
- Why create a composite of items?
- How do I know when it is appropriate to create a composite?
- How do I create a composite with items with different scale ranges?
- How do I create a composite with items labeled in opposite directions?
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